Use A Map
This is a new tool I found on the Ogle Earth Blog . Simply put, use a map lets you create a map location with a simple link address. When you click on the link you then have the option of viewing the map in Google, Yahoo, or MS Live. With new features you can also add pictures and other annotations.
Here is a map I made for Peaks Island, Maine: http://useamap.com/peaks
Here is another for the Penn State Mont Alto campus: http://useamap.com/MontAlto
It's easy to use and a great way to send maps to someone.